boeceer



(No Model.) 2 Sheets-.Sheet 1.

- A. BOEGHER.

FEBDING MEGHANISM FOR SEWING MACHINES.

@www 5s (No Model.) 2 Sheets-Sheet 2. A. BOEGHBR.

PEBDING MEGHANISMFOR SEWING MACHINES.

Patented July 20, 1886.

UNITED STATES PATENT .()EEICE ADAM BOECHEP, OF NET YORK, N. Y.

FEEDING MECHANlsM Foa sivvlNe-ivi/icl-i1Nte.V

SPEGIFICATN forming part of Letters Patent No. 3a5,948, Jui-y 20, 18556.

Application filed November 2l, 1885. Serial No. 1S3,.i50. (No model.)

To @ZZ whom, it may concern:

Be it known that I, ADAM BoEeHEE, a citizen of the United States, residing` at New York, in the county and State of New York, have invented new and useful Improvements in Feeding Mechanisms for Sewing-Machines, of which the following is a specification.

My invention relates to improvements in feeds for sewing-machines; and it consists in certain novel features of construction, which are fully pointed ont in the following specilication and claims, and illustrated in the accompanying drawings, in which- Figure l is a sectional side view. Fig. 2 is a section in the plane xx, Fig. 1. Fig. 31s an inverted plan .or bottom View. Fig. 4e is a section in the plane i/ y, Fig. 3. Fig. 5 is a section in the plane e e, Fig. 3; and Fig. 6, a detail view showing a modification hereinafter explained.

Similar letters indicate corresponding parts.

In the drawings, theletter A designates tlie arm or standard of a sewing-machine rising` from the cloth-plate B.

C is the main or`operating shaft, which is journaled in the arm A and from which the needle bar is operated. On this shaft are mounted two cams, I) and E, by which afourway motion is imparted to the feeddog a,and also an oscillating motion to the shuttle-carrier b. The shuttlecarrier Z1 is secured to one end of a horizontal lever, F, which is pivoted at G to the under side of the cloth-plate,while the other end of this lever is connected by a universal. joint, c, to an upright oscillating lever, II, pivoted at I in the arm A of the machine. The upper end of this lever is forked and embraces the cam D, secured to the main shaft Cb Vhen the latter is rotated, the action of the cam on the lever II will cause the same to oscillate on its pivot I, and by means of the universal joint c a similar motion will be imparted to the lever F, whereby the shuttle d will be properly carried back and forth in the shuttle-race e. The forked ends of both the levers J and II are split,and are provided with clamping-screws to admit of a compensating adjustment for wear at those points.

The feed-bar is operated' as follows: The cam E on the main shaft is embraced by the forked end of the elbow-lever J, which is pivot'ed atfin the arm A ofthe machine. This elbow-lever connects with the rod L by a slide, t. In the example showniu the drawings this slide .is moved by a thumbscrew, 7i, which has it-s bearings in two lugs, g, projecting from said elbowle\'cr. The rod L connects the elbow-lever J with an arm, j, projecting from the rock-shaft M, and the arms Z, Fig. l, projecting from the saine rock-shaft, carry the feed-bar N ,to which the feed-dog a,is attached, so that its upper roughened surface will act on the work under the needle when the machine is in operation. By means of the thumlr` screw 7L the slide i may be adjusted to a greater or less distance from the fulcrumf of the elbow-lever J, Fig. 1, whereby the motion of the connecting-rod L may be varied, thereby varying the throw of thefced-bar and regulating the length of thestitch. rl`he feed-bar N is provided with a hub, ai, which is carried loosely between the arms Z, projecting from the rock-shaft M, and to permit the feed-dog to operate properly a rising and falling motion is imparted to it by a pin, m, projecting from an arm, n, on the rock-shaft O, the rota' tion of which causes the'pin on the arm n to raise the fcedbar, while the action of the coiled spring o serves to depress the same as the arm n recedes. The rocking motion necessary for the latter operation is imparted to the rock shaft O by an anti-friction roller, p, secured to a lug, q, projecting from the horizontal oscila lating lever F. In the example shown in the drawings this roller acts on an arm,o', which projects from the rock-shaft O and has an incline onits outer end,Fig. 5, and, when the lever F oscillates,the rock-shaft O is rotated as the in* clined surface of the arm o follows the motion of the roller p, on which it rests, of its own weight and by the action of the coiled spring o.

It will be evident that the spring o may be dispensed with if the pin m,instead of pressing against the outside ofthe fced-bar,is inserted through a slotin the arm n; but I prefer the above-described construction.

That I claim as new, and desire to secure by Letters Patent, is

l. The combination, with a feed-bar, N, pivoted at one end, and devices for reciprocating the bar, of the rock-shaft O, having the inclined 'Larm r and the arm n, having a.

pin, m, engaging one end of the feed-bar,and the horizontally-oscillating shuttle-carrying lever F, having a roller or stud, 1), between its pivot and shuttle-carrier, which acts directly on the inclined arm for rocking the said shaft O and raising and lowering the feed-bar, substantially as described.

2. -The combination, with a feed-bar, N, pivoted at one end, and devices for reciprocating the bar lengthwise, of a rock-shaft, O, provided with the lateral arm oz,engaging the feed-bar, and having the curved arm r, the horizontally-oscillating shuttlecarrying lever F,pivoted between its ends,and having a roller, p, between its pivot andthe shuttle-carrier, which acts directly on the inclined arm, the main shaft C in the arm of the machine, the cam D, and the pivoted lever H,connect ing with the cam and with one end ofthe shnttle-carrying lever, substantially as described. l 3. The combination, with the rock-shaft M and the feed-bar N,pivotally connected at one end With said shaft, of the rock-shaft t), having the inclined arm 1', and the arm 11having a pin, m engaging the feed-bar and the shuttle-carrying lever F,oscillatcd horizontally from the main shaft C, and having a roller vor stud, j), acting directly on the iii-clined'end of the arm o', to rock said shaft O, si'ibsi'antially as described.

4. rlhe combination, with the rockshaft M, the feed-bar N, pivotally connected at one end therewith, and the spring @,fordepressingthe feed-bar, of the rock-shaft O, having an inclined arm, r, and an arm, a, provided with a pin, 1n, engaging the under side of thc feedbar, for lifting the latter, and the horizontallyoscillating shuttle carrying lever F, extending beneath the inclined arm and acting directly against the under side of the inclined end thereof, substantially as described.

5. The combination, with the rock-shaft M and the feed-bar N, pivoted at one end thereto, of the rock-shaft O, having an inclined arm, r, and an arm, a, provided with a pin, in, engaging one end of the feed-bar, and a horizontally-oscillatin g shuttle-carryin g lever,

F, extending beneath the inclined arm, and provided on its upper side with a lng, g, and a roller, 2i, journaled to said lug and acting di- 'rectly on the inclined end of the arm o', substantially as described.

6. The combination, with the rock -shaft I M, having the attached arm j, the feed-bar N, pivotaliy connected with the shaft, and means for raising and-lowering the feed-bar, of the pivoted elbow-lever J, having attached pendent lugs g, the main shaft C, having a cam, E, for oscillating said lever, a set-screw, h, journaled in the pendent lugs on the elbowlevcr, the slide t' on the scrc\v,and the rod L, connected with the slide and with t-he arm on the roekshaft, substantially as described.

In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses.

ADAM BURC/HER. [n s] Xilitiiesses:

W. HAUFF, f E. F. KAs'rENHUnEu. 

